initial code repo

This patch creates initial code repo.

For ceph, luminous stable release will be used for base code,
and next changes and optimization for ceph will be added to it.

For opensds, currently any changes can be upstreamed into original
opensds repo (https://github.com/opensds/opensds), and so stor4nfv
will directly clone opensds code to deploy stor4nfv environment.
And the scripts for deployment based on ceph and opensds will be
put into 'ci' directory.

Change-Id: I46a32218884c75dda2936337604ff03c554648e4
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/src/ceph/doc/dev/ceph-volume/systemd.rst b/src/ceph/doc/dev/ceph-volume/systemd.rst
new file mode 100644
index 0000000..8553430
--- /dev/null
+++ b/src/ceph/doc/dev/ceph-volume/systemd.rst
@@ -0,0 +1,37 @@
+.. _ceph-volume-systemd-api:
+
+systemd
+=======
+The workflow to *"activate"* an OSD is by relying on systemd unit files and its
+ability to persist information as a suffix to the instance name.
+
+``ceph-volume`` exposes the following convention for unit files::
+
+    ceph-volume@<sub command>-<extra metadata>
+
+For example, this is how enabling an OSD could look like for the 
+:ref:`ceph-volume-lvm` sub command::
+
+    systemctl enable ceph-volume@lvm-0-8715BEB4-15C5-49DE-BA6F-401086EC7B41
+
+
+These 3 pieces of persisted information are needed by the sub-command so that
+it understands what OSD it needs to activate.
+
+Since ``lvm`` is not the only subcommand that will be supported, this
+is how it will allow other device types to be defined.
+
+At some point for example, for plain disks, it could be::
+
+    systemctl enable ceph-volume@disk-0-8715BEB4-15C5-49DE-BA6F-401086EC7B41
+
+At startup, the systemd unit will execute a helper script that will parse the
+suffix and will end up calling ``ceph-volume`` back. Using the previous
+example for lvm, that call will look like::
+
+    ceph-volume lvm activate 0 8715BEB4-15C5-49DE-BA6F-401086EC7B41
+
+
+.. warning:: These workflows are not meant to be public, but are documented so that
+             it is clear what the tool is doing behind the scenes. Do not alter
+             any of these values.